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Received: from 30.74.144.118(mailfrom:baolin.wang@linux.alibaba.com fp:SMTPD_---0X8rQc9X_1786531950 cluster:ay36) by smtp.aliyun-inc.com; Wed, 12 Aug 2026 18:52:31 +0800 Message-ID: <6e4aae7b-2c71-4109-945c-6481efde3636@linux.alibaba.com> Date: Wed, 12 Aug 2026 18:52:30 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/2] Docs/mm: fix THP policy counts in transhuge To: "Lorenzo Stoakes (ARM)" , Song Hu Cc: linux-mm@kvack.org, akpm@linux-foundation.org, david@kernel.org, ziy@nvidia.com, liam@infradead.org, nico.pache@linux.dev, ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev, usama.arif@linux.dev, vbabka@kernel.org, rppt@kernel.org, surenb@google.com, mhocko@suse.com, corbet@lwn.net, skhan@linuxfoundation.org, rdunlap@infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260812080313.330413-1-husong@kylinos.cn> <20260812080313.330413-3-husong@kylinos.cn> From: Baolin Wang In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: BF6A814000C X-Stat-Signature: 6nrmkif379tnoindtenj8cn5opwhchga X-Rspam-User: X-HE-Tag: 1786531958-522615 X-HE-Meta: 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 TE6Rx6FU 86HDspVoVXrHeNpZgdPgxN+m2aqtPBu4w08SA0bnJ8P+p9sMsCRJAi4kvnSrvShvBYj03cad0Uy4gKtgY9gEAh43q6QmC12/ENWNWDZER5yfCmYpUzhP84jxdTGMOqd/K99kNKnqsNh74b93jaunU/SYV2wxgaTtFapkJ3Pk5bCS0Iy+cald75SFyJS8lwm4LiTfaqUnJjttMK1X+QqAYlyPaRIUM7kTSZJ7SJPIsJ0wnLyZxlg6Op9FgcIUxDZQv0Nq00k/RP98Pi0hvevcqqrfATKfJX4vOix2o0sgfZ50JTh7jWdHYjpg8KHZnG/MtswAS Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 8/12/26 5:27 PM, Lorenzo Stoakes (ARM) wrote: > On Wed, Aug 12, 2026 at 04:03:13PM +0800, Song Hu wrote: >> transhuge.rst claims seven policies for transparent_hugepage_shmem= and >> four for transparent_hugepage_tmpfs=. Both boot parameters are parsed by >> shmem_parse_huge(), which accepts six: always, within_size, advise, never, >> deny and force. The "four" applies only to the per-mount huge= option >> (shmem_param_enums_huge). Fix both counts to six. >> >> Signed-off-by: Song Hu >> --- >> Documentation/admin-guide/mm/transhuge.rst | 6 +++--- >> 1 file changed, 3 insertions(+), 3 deletions(-) >> >> diff --git a/Documentation/admin-guide/mm/transhuge.rst b/Documentation/admin-guide/mm/transhuge.rst >> index b187d618452f..72e944f49da5 100644 >> --- a/Documentation/admin-guide/mm/transhuge.rst >> +++ b/Documentation/admin-guide/mm/transhuge.rst >> @@ -389,14 +389,14 @@ is not defined within a valid ``thp_anon``, its policy will default to >> Similarly to ``transparent_hugepage``, you can control the hugepage >> allocation policy for the internal shmem mount by using the kernel parameter >> ``transparent_hugepage_shmem=``, where ```` is one of the >> -seven valid policies for shmem (``always``, ``within_size``, ``advise``, >> +six valid policies for shmem (``always``, ``within_size``, ``advise``, >> ``never``, ``deny``, and ``force``). > > I'm not sure we really want to advertise 'special' testing modes like this, > sorry. These are not modes anybody should be using in practice especially at > kernel boot. We should probably stop people doing that...! Yes, 'deny' and 'force' are testing-only configurations and really shouldn't be exposed via the kernel command line. I'll clean them up.